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md5crypt: Use all bits of currticks () to generate the salt.

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jochen 2000-10-25 14:28:20 +00:00
parent b16aca65b6
commit 8dd10ab852
2 changed files with 12 additions and 8 deletions
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6
ChangeLog
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@ -1,3 +1,9 @@
2000-10-25 Jochen Hoenicke <jochen@gnu.org>
* stage2/builtins.c (md5crypt_func): Use all bits of currticks ()
to generate the salt. The old code would often produce the same
one character salt.
2000-10-25 OKUJI Yoshinori <okuji@gnu.org>
* stage2/apm.S (get_apm_info): Fix a serious typo: prot_to_real

14
stage2/builtins.c
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@ -2378,7 +2378,7 @@ md5crypt_func (char *arg, int flags)
{
char crypted[36];
char key[32];
int saltlen;
int seed;
int i;
const char *const seedchars =
"./0123456789ABCDEFGHIJKLMNOPQRST"
@ -2391,20 +2391,18 @@ md5crypt_func (char *arg, int flags)
grub_memmove (crypted, "$1$", 3);
/* Create the length of a salt. */
saltlen = currticks ();
saltlen &= 7;
saltlen++;
seed = currticks ();
/* Generate a salt. */
for (i = 0; i < saltlen; i++)
for (i = 0; i < 8 && seed; i++)
{
/* FIXME: This should be more random. */
crypted[3 + i] = seedchars[(currticks () >> i) & 0x3f];
crypted[3 + i] = seedchars[seed & 0x3f];
seed >>= 6;
}
/* A salt must be terminated with `$', if it is less than 8 chars. */
if (saltlen != 8)
crypted[3 + i] = '$';
crypted[3 + i] = '$';
#ifdef DEBUG_MD5CRYPT
grub_printf ("salt = %s\n", crypted);